Chikunov, S.O., Ponkratov, V.V., Sokolov, A.A., Pozdnyaev, A.S., Osinovskaya, I.V. and Ivleva, M.I. 2019. Financial Risks of Russian Oil Companies in Conditions of Volatility of Global Oil Prices. International Journal of Energy Economics and Policy. 9, 3 (Apr. 2019), 18–29.